// Copyright © 2021 sealos.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cni

import (
	"bytes"
	"text/template"
)

const (
	defaultInterface = "eth.*|en.*"
	defaultCIDR      = "100.64.0.0/10"
	defaultCNIRepo   = "k8s.gcr.io"
)

type MetaData struct {
	Interface string
	CIDR      string
	// ipip mode for calico.yml
	IPIP bool
	// MTU size
	MTU     string
	CniRepo string
	Version string
}

// Net is CNI interface
type Net interface {
	Manifests(template string) string
	Template() string
}

func NewCalico(metadata MetaData) Net {
	return &Calico{metadata: metadata}
}

func render(data MetaData, temp string) string {
	var b bytes.Buffer
	t := template.Must(template.New("net").Parse(temp))
	_ = t.Execute(&b, &data)
	return b.String()
}
